EN 61811-1:2015/A2:2026
(Amendment)Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification
- Status
- Published
- Publication Date
- 10-Sep-2026
- Technical Committee
- CLC/SR 94 - All-or-nothing electrical relays
- Current Stage
- 6060 - Document made available - Publishing
- Start Date
- 11-Sep-2026
- Due Date
- 18-Dec-2026
- Completion Date
- 11-Sep-2026
EN 61811-1:2015/A2:2026 is a CENELEC amendment to the European Standard for electromechanical telecom elementary relays of assessed quality. It updates the generic specification and blank detail specification so manufacturers, test laboratories and specifiers use the same relay construction definition, test voltages and detail-specification template. The amendment adopts IEC 61811-1:2015/AMD2:2026 without modification.
What does EN 61811-1:2015/A2:2026 specify?
EN 61811-1:2015/A2:2026 specifies changes to EN 61811-1:2015 for electromechanical telecom elementary relays of assessed quality. In practice, it adds one relay construction type, updates the characteristic test values in Annex B, and expands the blank detail specification example in Annex C.
| Annex | What it covers |
|---|---|
| Annex B | Characteristic values of the relay, including dielectric and impulse test voltages |
| Annex C | Blank detail specification and example front pages, including a new Type 5 example |
The amendment text is organized around Clause 3 and Annexes B and C. That tells readers where the new relay type is defined, where the revised test levels are listed, and where the detail-specification example is shown.
What are the key requirements of EN 61811-1:2015/A2:2026?
EN 61811-1:2015/A2:2026 mainly changes the relay type definition and the test values used to assess it. It matters because these updates affect product design, qualification testing and the content of detail specifications.
New relay construction type in Clause 3
Clause 3 adds a new relay construction type 5: two change-over contacts on a 9.1 mm x 4.9 mm maximum base. For manufacturers, this creates a named construction option that can be specified and tested under the standard.
Revised dielectric test voltages in Annex B
Annex B replaces Table B.1 with updated dielectric test voltages for types 0 to 5. The table covers opened contact circuits, adjacent contact circuits, coil to contact circuits and, where applicable, separated windings. In practice, this is the test set that shows whether insulation between relay parts is adequate for the intended construction.
Revised impulse test voltages in Annex B
Annex B also replaces Table B.2 with updated impulse test voltages. The table assigns pulse-shape test conditions for opened contact circuits, adjacent contact circuits and coil to contact circuits. For test engineers, this means the relay must withstand the specified impulse conditions during qualification or verification.
Expanded blank detail specification in Annex C
Annex C updates the front-page layout for detail specifications and adds a Type 5 example. The example shows the expected description of the relay, its construction, its application statement, coil data, contact data and climatic category. That helps users prepare a consistent detail specification instead of inventing their own format.
Practical detail points in the Type 5 example
The Type 5 example in Annex C describes a dual-in-line relay with a plastic sealed case and gives the intended mounting styles, including printed circuit boards and surface mounting technology (SMT) where applicable. It also states the relay is for telecommunication applications and may also suit control or switching functions in industrial and other applications. For buyers and designers, this clarifies the intended use context of the new construction type.
What terms does EN 61811-1:2015/A2:2026 define?
- Type 5 - A relay construction type with two change-over contacts and a 9.1 mm x 4.9 mm maximum base.
- Generic specification - The common specification framework that applies across relay variants before a product-specific detail specification is written.
- Blank detail specification - A template for writing the product-specific detail specification for a relay type.
- Change-over contacts - Contacts that switch between one circuit path and another.
- SMT - Surface mounting technology, used here for relays mounted directly on printed circuit boards.
- a.c. - Alternating current, used in the test-voltage and contact-rating tables.
- d.c. - Direct current, used in the test-voltage and contact-rating tables.
- IEC - International Electrotechnical Commission, the body that published the amended international standard.
Who uses EN 61811-1:2015/A2:2026?
EN 61811-1:2015/A2:2026 is used by relay manufacturers, component specifiers, test laboratories, quality managers and purchasers of telecom relays. Manufacturers use it to define a relay construction and prepare a detail specification. Test labs use it to apply the correct dielectric and impulse test levels. Buyers and quality staff use it when checking whether a relay is specified for telecommunication, PCB-based control or switching applications.
What changed in EN 61811-1:2015/A2:2026 from the previous edition?
EN 61811-1:2015/A2:2026 is Amendment 2 to EN 61811-1:2015. The amendment adds Type 5, replaces the dielectric test voltage table in Annex B, replaces the impulse test voltage table in Annex B, and adds a Type 5 front-page example in Annex C.
Which standards are used with EN 61811-1:2015/A2:2026?
The Type 5 front-page example in Annex C cites IEC 61810-1, IEC 61810-2 and IEC 61810-7 as related component standards. It also uses IEC 60068-1 for the component climatic category. The European amendment is based on IEC 61811-1:2015/AMD2:2026, which CENELEC approved without modification.
What does the EN 61811-1:2015/A2:2026 document contain?
EN 61811-1:2015/A2:2026 contains a short amendment foreword, the new Type 5 definition in Clause 3, revised characteristic-value tables in Annex B, and revised blank detail specification examples in Annex C. The annex material is the part most readers will use for design and testing because it shows the relay type, the test voltages and the detail-specification layout. The document also includes an example front page with the key to the layout, plus example fields for construction, application, coil data, contact data and climatic category.
Relations
- Effective Date
- 04-Nov-2025
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Frequently Asked Questions
EN 61811-1:2015/A2:2026 is a amendment published by CLC. Its full title is "Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification". This standard covers: Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification
Electromechanical telecom elementary relays of assessed quality - Part 1: Generic specification and blank detail specification
EN 61811-1:2015/A2:2026 is classified under the following ICS (International Classification for Standards) categories: 29.120.70 - Relays. The ICS classification helps identify the subject area and facilitates finding related standards.
EN 61811-1:2015/A2:2026 has the following relationships with other standards: It is inter standard links to EN 61811-1:2015. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
EN 61811-1:2015/A2:2026 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-november-2026
Elektromehanski telekomunikacijski stikalni releji ocenjene kakovosti - 1. del:
Rodovna specifikacija in okvirna podrobna specifikacija - Dopolnilo A2
Electromechanical telecom elementary relays of assessed quality - Part 1: Generic
specification and blank detail specification
Elektromechanische Telekom-Elementarrelais mit bewerteter Qualität - Teil 1:
Fachgrundspezifikation und Bauartspezifikation
Relais télécom électromagnétiques élémentaires soumis au régime d'assurance qualité -
Partie 1: Spécification générique et spécification particulière cadre
Ta slovenski standard je istoveten z: EN 61811-1:2015/A2:2026
ICS:
29.120.70 Releji Relays
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EUROPEAN STANDARD EN 61811-1:2015/A2
NORME EUROPÉENNE
EUROPÄISCHE NORM September 2026
ICS 29.120.70
English Version
Electromechanical telecom elementary relays of assessed
quality - Part 1: Generic specification and blank detail
specification
(IEC 61811-1:2015/AMD2:2026)
Relais télécom électromagnétiques élémentaires soumis au Amendment 2 - Elektromechanische Telekom-
régime d'assurance qualité - Partie 1: Spécification Elementarrelais mit bewerteter Qualität - Teil 1:
générique et spécification particulière cadre Fachgrundspezifikation und Bauartspezifikation
(IEC 61811-1:2015/AMD2:2026) (IEC 61811-1:2015/AMD2:2026)
This amendment A2 modifies the European Standard EN 61811-1:2015; it was approved by CENELEC on 2026-08-14. CENELEC
members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment the
status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This amendment exists in three official versions (English, French, German). A version in any other language made by translation under the
responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the same status as
the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2026 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 61811-1:2015/A2:2026 E
European foreword
The text of document 94/1175/CDV, future edition 2 of IEC 61811-1/AMD2, prepared by TC 94
"Electrical relays" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2027-09-30
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2029-09-30
document have to be withdrawn
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 61811-1:2015/AMD2:2026 was approved by CENELEC as
a European Standard without any modification.
IEC 61811-1 ®
Edition 2.0 2026-07
INTERNATIONAL
STANDARD
AMENDMENT 2
Electromechanical telecom elementary relays of assessed quality -
Part 1: Generic specification and blank detail specification
ICS 29.120.70 ISBN 978-2-8327-1333-4
IEC 61811-1:2015-01/AMD2:2026-07(en)
IEC 61811-1:2015/AMD2:2026 © IEC 2026
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
Electromechanical telecom elementary relays of assessed quality -
Part 1: Generic specification and blank detail specification
AMENDMENT 2
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as "IEC Publication(s)"). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
with the IEC also participate in this preparation. IEC collaborates closely with the International Organization for
Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence between
any IEC Publication and the corresponding national or regional publication shall be clearly indicated in the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ens
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